1. Let B be a 4x4 matrix to which we apply the following operations: 1) Double column 1 2) Halve row 3 3) Add row 3 to row 1 4) Interchange columns 1 and 4 5) Subtract row 2 from each of the other rows 6) Replace column 4 by column 3 7) Delete column 1 (so that the column dimension is reduced by 1) Write the result as a product of eight matrices